PT1500687E - Ink for silk-screen printing and corresponding printing technique - Google Patents

Abstract

The present invention relates to inks for silk-screen printing technique, as well as the corresponding printing technique, designed to bestow upon the reproduction obtained by means of the use of said inks on an appropriate substrate, preferably of a paper type, a particular feel, preferably a particular roughness or coarseness. In particular, the present invention relates to an ink for silk-screen printing of catalogues or advertising leaflets for products designed for decorative wall coatings that will reproduce also the feel of the final decoration applied on the wall substrate.

Description

1

Description " Serigraphic printing ink & corresponding printing technique " The present invention relates to serigraphic printing inks as well as to the corresponding printing technique designed to confer reproduction obtained through the use of said inks on a suitable substrate preferably of a paper type having a particular texture, preferably a rough roughness / texture individuals. Serigraphic printing is a printing process that uses a shape - designated as a structure or sieve - consisting of a very fine mesh fabric that is allowed to be permeable to ink in the areas of the image to be reproduced and impermeable in other areas. The structure is formed by a net that can be made with strips of polyester, nylon or steel drawn on structures of iron or aluminum of variable size with a tension of 4-7 bar with. a more or less fine mesh according to the chromatic effect to be obtained and has the shape of the pattern to be reproduced. The structures commonly used for serigraph printing have a web ranging from 10-150 strips / cm 2 depending on the type of ink used and the amount to be released onto the substrate. The preparation of the structure can be carried out manually by plotting the pattern to be reproduced with a lithographic pencil. The stroke closes the underlying layers between the weft and the warp. Then all spaces that are not involved in the pattern are closed with a special glue and then using a solvent (alcohol or benzene), the entire thick pencil trait is removed 2 exposing the holes that had been occluded. The preparation of the structure can also be carried out mechanically, in particular photomechanically. Printing can be done manually or by using special machines. In the first case, the paint is dispensed using a spatula designated as the doctor's blade or knife over the net stretched over the appropriate structure.

Applying pressure to the doctor's blade as it slides from one end of the structure to the other causes the ink to pass through the network over the substrate to be printed. The average thickness of the dried ink deposited in each passage is between 50 and 100 μ. The machinery used for screen printing is substantially made of surfaces which apply suction pressure and / or use special glues linearly or rotating on a carousel with one to eight colors and intermediate drying chambers with IR or UV lamps or hot air lamps . Said drying apparatuses may furthermore be equipped with movable belts or belts of the length necessary for the polymerization of the paint used or they can be manually dried in structures which can be placed on top of one another. This machine may furthermore be equipped with an apparatus for inserting / removing a sheet. The silk screen printing system is generally used for printing fabrics, paper packaging made of aluminum, or plastic materials, road signs and also furnishings, earthenware and toys.

The printing inks are generally formed by a dye part and a binder part. The dyeing moiety may be obtained with pigments and soluble dyes wherein the pigment " is meant an insoluble colored compound which is not a binder of the ink, whereas by " soluble dye " 3 is meant a colored compound that is soluble in the binder. In turn, the binder is comprised of a carrier, a modifier of the vehicle and a solvent. The typical composition of an ink is given in Table 1.

Table 1

Dyestuff Synthetic resins Plasticizers Waxes Oils Wetting agents Stabilizers Anti-foaming agents Extracting agents Aliphatic compounds Aromatic compounds Ketones Esters Water The coloring part determines the color characteristics of the paint. Organic pigments are characterized by good transparency, with the exception of carbon black, which is a semi-cover and fluorescent pigments that are covering.

Inorganic pigments have characteristics of a high coverage power with the exception of some colors that are transparent (iron blue) or semi-covering (kaolin, calcium carbonate, aluminum hydrate). On the contrary, soluble dyes are characterized by a very high transparency. The color intensity is adjusted with thick white coverage or transparent inks. The binder portion of a printing ink is formed as viewed by a carrier, modifier, and solvent. The carrier basically consists of natural or synthetic resins which impart to the paint characteristics which are fundamental from a chemical-physical point of view.

Natural resins have been of considerable importance in the formulation of printing inks. Currently the tendency is to replace them with resins of a synthetic type.

The synthetic resins may be used alone, or mixed with one another and, in some cases, also mixed with natural resins provided there is a good degree of compatibility, whereby " compatibility " it is meant that two or more resins may form a stable and homogeneous solution which does not give rise over time to phenomena of separation, precipitation or turbidity.

The main resins used are epoxy, vinyl, hydracarbon, nitrocellulose, maleic, melamine, phenol-formaldehyde, urea-formaldehyde, alkyd, acrylate, or polyurethane resins.

Modifiers are used to impart particular characteristics to the paints, such as, for example, plasticity, flexibility, mechanical strength of the surface, etc. Esters of sebacic and glycolic phthalic acids are generally used as plasticizers; with respect to waxes, the natural ones are used, such as for example carnauba wax, or synthetic waxes, for example polyethylene; with respect to oils, linseed oil, soybean oil and wood oils may be used; the manganese, zinc, cobalt and zirconium salts of naphthene, octyl and linoresinic acids are used as the excicant. 5

The solvents have an extremely important dual function: they must impart to the ink the fluidity necessary to allow the transfer of the printing form (sieve or structure) to the substrate and must furthermore constitute the mobile phase of the ink drying process, ie the component which has to be removed either by penetration or by evaporation, or by selective filtration at the time of application of the paint on the substrate. The ink film remaining on the material has a constant thickness, in all cases much greater than in the typographic and lithographic processes; consequently much greater effects of hedging power are achieved. This allows for prints with high resistance to light and chemical agents. In addition, the system does not require high printing pressures which are required in other processes. Network printing inks are also used to obtain articles with a cover film having excellent resistance against. risks and uses as documented. Among other documents WO-A-02/22953, DE-A-37 18 561, JP-A-01174574. The object of the present invention is the development of screen printing inks on a substrate, preferably, but not exclusively, of a paper type, which will be able to give the reproduction thus obtained a particular texture of roughness / roughness and thickness. The present invention relates more preferably to a screen printing ink on a substrate paper of catalogs or advertising leaflets for drawn products. for decorative wall coverings, in addition to the reproduction of colors and decorative effects (typically also of catalogs 6 usually for sale), they reproduce in an innovative way the texture (the rough texture, roughness and thickness) of the final decoration applied on the mural substrate .

An obvious advantage of this invention is that it is possible to evaluate in addition to the color and decorative effects also the actual impact and effective response of the decorative product applied on the wall surface to be decorated thereby facilitating the consumer's choice of the color and the desired effect. Said object is achieved by a careful choice and by the right proportion of the different components of the screen printing ink, in particular by adding the main components of the screen printing ink of mineral fillers, preferably silica of suitable grain size, with the The object of the present invention is to provide the screen printing ink when printed on a substrate preferably of a type of paper having a rough texture and roughness which the basic ink will have, once applied to a wall substrate. The screen printing ink which is the subject of the present invention may be vinyl based, glossy, or matte, transparent or cover in pigmented colors with liquid pigments or metallic effect pigments. The ink may furthermore be fluorescent, phosphorescent, metallic, or with a embossed or thick embossed effect.

According to the invention, the above object is achieved thanks to the solution mentioned especially in the following claims.

The dependent claims show particular embodiments of the invention. The invention will now be described in detail with reference to a preferred example of the embodiment - preparation of a catalog for decorative wall products - purely by way of non-limiting examples.

Example 1. Serigraphic printing ink reproducing the catalog " Antiche Terre Fiorentine 2 "

Starting from a preprinted card with topographic printing with the necessary colors and decoration, a serigraphic printing process is adopted in order to give the desired effect (gloss or matte) and roughness, in particular by adding to the printing ink which has a mineral filler base, preferably quartz (silica) flour of different particle sizes which is mixed with the other paint components. gave rise to a texture of roughness proper to plaster of wall surfaces.

Optionally, additives and / or solvents designed to retard the drying of the paint and / or to adjust its viscosity during the application process can be used.

Table 2 shows the screen printing ink formulation to give a glossy effect (all formulations are understood to be expressed in parts by weight).

Table 2

Component Amount (parts by weight) Glossy clear ink 97.7 to 88 Drying retarder 0.5 to 10 Quartz flour 71 Âμm of 0.9 to 6 Quartz flour 100 Âμl 0.9 to 6 Solvent to adjust at up to 100 viscosity 8

Among the bright transparent ink components, formaldehyde may for example be cited. The solvents contained in the clear ink may be selected from the group consisting of isobutane, methoxypropanol, methoxypropyl acetate, toluene, ethyl benzene and xylene. Binders basically consist of polyacrylates.

Among the components of the drying retardant there may be mentioned diisopropyl ether, methoxypropanol, aliphatic hydrocarbons having up to 10 carbon atoms, hydroxymethylpentanone, diisoheptyl phthalate and diisononyl phthalate. The binders are basically constituted by polyacrylates.

The mineral fillers used herein and referred to as quartz flour are made substantially of silica SiO2 with the presence to a lesser extent (almost at an impurity level) of other compounds such as Al203, Fe203, etc.

Among the components of the viscosity adjusting solvent, the following may be mentioned: 1-methyl-2-methoxyethyl acetate; solvent petroleum naphtha 100; -1-methoxy-2-propanol; and-cyclohexanone The formulation to obtain the matte effect is shown in Table 3.

Table 3

Component Amount (parts by weight) Matte clear ink 97.7 to 88 Drying retarder 0.5 to 10 Quartz flour 71 μπι from 0.9 to 6 Quartz flour 100 μτη from 0.9 to 6 Solvent to adjust at up to 100 viscosity 9

Among the components of the matt transparent ink, the following solvents may be mentioned: diacetone alcohol; -1,2,4-trimethylbenzene; 1-methyl-2-methoxyethyl acetate; solvent naphtha of oil 100; xylene; - mesitylene; and propylbenzene

The binders are basically polymethylmethacrylate. The formulation of Table 2 or 3 is applied to the carton which functions as a substrate already printed typographically in the desired colors.

For the above purpose, a serigraphic printing structure made of polyester fabric, or steel, is used. The fabric of the structure may have a web which is more or less thin or dense (from 10 to 150 strips / cm 2) depending on the type of ink to be deposited on the carton substrate. In the specific case it may be preferably characterized by a density of 32 strips / cm 2 to 110 strips / cm 2.

Once the ink is applied to the pre-printed card, it is placed in the oven to dry (for both glossy and matte effect). The temperature of the oven may range from 50 ° C to 85 ° C according to the amount of drying retarder used during a time ranging from 1 minute to 2 minutes and thirty seconds. The previously described process may be repeated a number of times according to the desired effect. By increasing the number of passages in fact different shades of color, thickness and roughness are obtained. 10

Example 2. Serigraphic printing ink reproducing the catalog "Antiche Terre Florentine Iridescenti and Metallico Gold e Silver"

Neutral cards are used to obtain this catalog. The objective has already been seen and is to obtain colors and decorations (spots) accompanied by tactile effects of roughness and coarse texture, corresponding as much as possible to reality reproducing the decorative finish obtained on the surface of the wall. The non-colored neutral card is initially printed by serigraph printing to obtain the base.

For the above purpose the formulation shown in Table 4 is used (the color will be different depending on the pigment used).

Table 4

Component Amount (parts by weight) Water to 100 Sodium hexametaphosphate 0.1 to 0.5 Anti-foaming agent 0.1 to 0.5 Thickener of 0.2 to 0.9 Preservative agent of 0.7 to 2 , 5 Wetting agent from 0.2 to 1.1 Pigment from 2 to 10 Calcium carbonate from 19 to 48 Calcium kaolin from 0.5 to 8 Poprilene glycol from 1 to 6 Coalescent from 0.3 to 1.5 Versatile vinyl emulsion in water phase from 5 to 20 2-amino-2-methyl-1-propanol from 0.1 to 0.5 quartz flour from 1 to 10 dye toner (different for each color in the catalog) from 10 to 20 The formulation of Table 4 is used to spread and print the iridescent base. This composition is spread over the first structure for the first pass. In the second passage the composition will be used which will print the first attenuated white spot in the color (Table 5). The next passage will print (with a suitable formulation reproduced in Table 6) the most intense color and defined white spot in color. The fourth and final printing pass will give the cardboard substrate the metallic or iridescent effect and the roughness texture (ink shown in Table 7).

The four printing passages are separated from each other by exposing the quick drying paperboard using IR lamps and final drying in an oven, where the temperature can range from 50øC to 85øC. The ink formulation designed to print the whiter, brighter stain in color is shown below (Table 5).

Table 5

Component Amount (parts by weight) Water to 100 Sodium hexametaphosphate 0.1 to 0.5 Cellulose thickener 0.5 to 2 Wetting agent 0.1 to 0.5 Dispersing agent of 0.05 to 0.3 Antifoam agent 0.05 to 0.3 Coalescent of 0.4 to 1.2 Hexylene glycol of 1 to 7.5 Propylene glycol 0.05 to 0.5 Ethylene glycol of 0.05 to 1.5 Emulsion acrylic copolymer in aqueous phase 10 to 25 Anti-foaming agent of 0.2 to 0.5 silicone 2-amino-2-methyl-1-propanol of 0.05 to 1 Preservative agent of 0.15 to 0.5 12 (continuation)

Component Quantity (parts by weight) Pigment 3 to 10 Kaolin calcined from 1 to 5 Talc from 1 to 5 Pigment brown from 0.005 to 0.008 Pigment yellow 0.008 to 0.030 Pigment black 0.002 to 0.008 Thickener 0.2 to 0.7 The formulation of color ink designed to print the white spot that is most intense in the hue of the ink is shown below in Table 6.

Table 6

Component Amount (parts by weight) Water to 100 Sodium hexametaphosphate from 0.200 to 1 Cellulose Thickener from 0.200 to 1.5 Wetting agent from 0.500 to 1.5 Dispersing agent from 0.010 to 0.2 Anti-foaming agent from 0.100 to 0 , 5 Coalescent from 0.300 to 1.2 Hexylene glycol from 1 to 3 Propylene glycol from 0.100 to 1.5 Ethylene glycol from 0.200 to 0.8 Acrylic emulsion in aqueous phase from 10 to 25 Anti-foaming agent from 0.100 to 0, 7 Silicone 2-amino-2-methyl-1-propane 1 from 0.050 to 0.5 Preservative agent from 0.400 to 1.3 Pigment from 15 to 30 Kaolin calcined from 5 to 12 (continued)

Component Amount (parts by weight) Talc of 1 to 9 Pigment brown 0.004 to 0.01 Pigment yellow 0.004 to 0.01 Thickener 0.050 to 1

To obtain an iridescent effect (in six different shades of paint according to a particular pigment used), or a metallic effect (gold, silver, etc.) and at the same time give the catalog the typical effect of roughness and thickness of the wall to be decorated uses the formulation presented in Table 7.

Table 7

Component Amount (parts by weight) Water to 100 Sodium hexametaphosphate from 0.05 to 0.5 Cellulose thickener from 1 to 1.9 Wetting agent from 0.05 to 0.5 Dispersing agent from 0.05 to 0.4 Anti-foaming agent from 0.1 to 0.6 Coalescent from 0.3 to 1.5 Hexylene glycol from 1 to 8 Acrylic emulsion in aqueous phase from 12 to 30 Anti-foaming agent from 0.1 to 0.5 Thickener 0.1 to 0.7 2-amino-2-methyl-1-propanol 0.050 to 0.4 Preservative agent of 0.2 to 1 Pigment with iridescent or metallic effect of 5 to 15 Quartz flour 71 μl of 1 a 6 Flour of quartz 100 μπι from 1 to 6

At the end of these four silk screen printing passes, the carton will be subjected to a passage in the kiln during final drying. The temperature of the oven may vary from 50 ° C to 85 ° C for a period of time from 1 minute to 2 minutes 30 seconds.

Example 3. Serigraphic printing ink reproducing the catalog " Antiche Terre Fiorentine Perlescenti "

Neutral cards that have not been preprinted are used to obtain this particular catalog. The uncoloured neutral card is printed by screen printing to obtain the base.

For this purpose, the general formulation of Table 8 is used (the color will be different for the six catalog colors, and this will be obtained by varying the pigments in the formulation).

Table 8

Component Amount (parts by weight) Water to 100 Sodium hexametaphosphate 0.1 to 0.5 Anti-foaming agent 0.1 to 0.7 Thickener of 0.2 to 0.8 Preservative agent of 1 to 8 Wetting agent from 0.1 to 0.5 Pigment from 3 to 18 Calcium carbonate from 20 to 40 Calcium kaolin from 2 to 5 Propylene glycol from 0.5 to 2.5 Coalescent from 0.5 to 1.5 Dimer from 0.5 to 5 Acrylic emulsion in aqueous phase from 8 to 20 Mold repellent from 0.5 to 12-amino-2-methyl-1-propanol from 0.1 to 0.5 Quartz flour 100 μl from 5 to 15

This formulation will be spread on a first frame for a first pass of a screen printing to produce the card with the base of the desired color. In the second passageway of the silk screen printing is provided a ink for printing a color-attenuated type of stain (Table 9), and subsequently in a third passage the iridescent / pearl effect will be created and the necessary coarse effect will be provided (Table 10) . The last passage will use a formulation designed to print the most intense stain that is defined in color (Table 11).

The four printing passages are separated from each other by exposing the treated cartons to rapid drying using infra-red lamps and finally drying in the oven at a temperature ranging from 50øC to 85øC. The formulation of the printing ink for the production of the spot attenuated in color is shown in Table 9.

Table 9

Component Quantity (parts by weight) Water to 100 Sodium hexametaphosphate 0.1 to 0.6 Preservative 0.2 to 0.6 Anti-foaming agent 0.1 to 0.5 Cellulose thickener 0.2 to 1.2 Wetting agent from 0.2 to 0.6 Dispersing agent from 0.01 to 0.2 Silicate defoamer from 0.05 to 0.2 Coalescent from 0.5 to 1.5 Hexylene glycol from 0 , 6 to 1.5 Acrylic emulsion in aqueous phase of 5 to 15 Thickener of 0.05 to 0.9 2-amino-2-methyl-1-propanol 0.1 to 0.4 Pigment of 7 to 20 calcium from 15 to 35 Kaolin calcined from 2 to 7 Propylene glycol from 0.4 to 1.5 Dimer from 0.5 to 2 Vinylic emulsion in aqueous phase from 4 to 10 Mold repellent from 0.5 to 1 Ethylene glycol from 0 , 1 to 0.8 Talc of 1 to 5 Quartz flour 100 μl of 2 to 8 The iridescent / pearlescent effect in the six different shades of ink according to the particular pigment used will be obtained using the ink formulation which is shown in table 10.

Table 10

Component Amount (parts by weight) Water to 100 Sodium hexametaphosphate from 0.05 to 0.5 Cellulose thickener from 1 to 1.9 Wetting agent from 0.05 to 0.5 Dispersing agent from 0.05 to 0.4 Anti-foaming agent from 0.1 to 0.6 Coalescent from 0.3 to 1.5 Hexylene glycol from 1 to 8 Acrylic emulsion in aqueous phase from 12 to 30 Anti-foaming agent from 0.1 to 0.5 Thickener 0.1 to 0.7 2-amino-2-methyl-1-propanol from 0.050 to 0.4 Preservative agent from 0.2 to 1 Pigment with iridescent or metallic effect from 5 to 15 Quartz flour 71 μl of 1 a 6 Flour of quartz 100 μπι from 1 to 6

During this printing step the typical roughness and thickness effect has already been further imparted to the wall surface to be plasticized using a quartz flour having a different type of grain. The ink formulation for printing the intense and defined color spot is given in Table 11.

Table 11

Component Quantity (parts by weight) Neutral paste from 90 to 99.9 Pigments from 10 to 0.1

Among the solvents contained in the neutral paste are benzene, toluene, ethyl benzene, xylene, aliphatic hydrocarbons of up to 8 carbon atoms, and alkyl benzenes. The binders contained in the neutral paste are basically comprised of polyacrylates.

The pigments vary in the paints and in the quantities according to the colors that need to be reproduced.

At the end of these four passages, the carton which was then subjected to screen printing is then subjected to another passage for final drying for 1 minute to 2 minutes and 30 seconds.

Example 4. Serigraphic printing ink that reproduces the catalog " Ori & Argenti "

Starting from the preprinted card with the typeface printing in the necessary colors and decorations, the serigraphic printing will then be carried out in two distinct steps with specially designed inks in order to reproduce both the desired coloring effect and the desired roughness. The decor " Ori & Argenti " is presented in two variants, namely the gold variant and the silver variant. The formulation used in the first pass of the silk-screen printing for both the gold and the silver effect is shown in Table 12. 18

Table 12

Component Quantity (parts by weight) Matte transparent ink 99.5 to 90 Drying retarder 0.5 to 10 Quartz flour 71 μπι from 1 to 6 Quartz flour 100 μτη from 1 to 6 Solvent to adjust viscosity to 100

Quartz flours with different grain sizes that are present in the paint mix provide the coarse texture of plaster and wall surfaces. It is also possible to use additives and solvents designed to retard the drying of the paint and in particular the viscosity during the time of application.

In the next passage of the serigraphic impression the gold variant will be differentiated from the silver tone. The printing ink formulation designed to print the gold variant is given in Table 13.

Table 13

Component Amount (parts by weight) Water to 100 Sodium hexametaphosphate from 0.100 to 0.500 Cellulose Thickener from 0.700 to 1.900 Wetting agent from 0.100 to 0.600 Dispersing agent from 0.050 to 0.300 Silicate defoamer from 0.3 to 1 Coalescent of 0,300 to 2 Hexylene glycol from 1 to 8 Acrylic emulsion in aqueous phase from 10 to 30 Thickener from 0.100 to 1.500 2-amino-2-methyl-1-propanol from 0.100 to 0.600 Preservative agent from 0.200 to 1 Pigment with a gold effect metallic from 2 to 10 19 The silver variant will have the same formulation and will only vary in the choice of pigment with metallic effect which in this case will have a similar metallic silver effect.

Also in this case, at the end of both printing passages the carton will be subjected to a passage in the kiln for final drying at a temperature between 50 ° C and 85 ° C and for a period between 1 minute and 2 minutes and 30 seconds .

Of course, without detracting from the principle of the invention the details of the implementation and the embodiments may vary widely from what is illustrated purely by way of example, without thereby departing from the scope of protection of the present invention.

Lisbon, June 11, 2008

Claims (36)

Serigraphic printing ink which imparts roughness, coarse texture and / or thickness to the reproduction obtained by the use of said paint, comprising mineral fillers, characterized in that said mineral fillers are present in an amount comprised in a range of 0.01 to 20 parts by weight, wherein said mineral fillers which are present have a particle size comprised between 50 μm and 200 μm wherein the reproduction obtained by the use of said paint has a coarse texture comprised between 50 μτη and 250 μτη. Ink according to claim 1, characterized in that said mineral fillers are predominantly made up of silica. Ink according to claim 1, characterized in that the particle size is preferably comprised between 70 μmι and 100 μτη. An ink according to claim 1 or claim 2, characterized in that said mineral fillers have a particle size of less than 250 μm. An ink according to claim 1 or claim 2, characterized in that said mineral fillers have a particle size of less than 150 μ. Ink according to any one of claims 1 to 5, characterized in that said mineral fillers 2 are present in an amount preferably in the range of 0.09 to 10 parts by weight. Ink according to any one of claims 1 to 5, characterized in that a binding part is associated with said mineral fillers. Ink according to claim 7, characterized in that said binder part consists of at least one carrier, at least one modifier and at least one solvent. Ink according to claim 8, characterized in that said carrier is selected from the group consisting of vinyl, acrylate, polyurethane, epoxides, nitrocellulose, maleic, polyester, melamine, phenol-formaldehyde, urea- formaldehyde and alkyds. Ink according to claim 9, characterized in that said carrier comprises vinyl resins. An ink according to claim 9, characterized in that said carrier is comprised of acrylate type resins. Ink according to claim 8, characterized in that said modifier is selected from the group consisting of phthalic, sebacic and glycolic acids and their derivatives, linseed oil, soybean oils, wood oil, carnauba wax, polyethylene waxes , salts of manganese, zinc, cobalt and naphthalene zirconium, octo and linoresinic acids and coalescing agents. 3 An ink according to claim 12, characterized in that said modifier is composed of phthalic acid esters. Ink according to claim 12, characterized in that said modifier comprises a coalescing agent. A paint according to claim 8, characterized in that said solvent is selected from the group consisting of water, aliphatic hydrocarbons having up to 10 carbon atoms, isobutane, alkylbenzenes, methoxypropanol, hydroxymethylpentanone, methoxypropyl acetate, benzene, toluene, ethylbenzene, xylene and diisopropyl ether. An ink according to claim 15, characterized in that said solvent is water. Ink according to claim 15, characterized in that said solvent is methoxypropanol. Ink according to any one of Claims 9 to 17, characterized in that said binder part consists of vinyl resins, phthalic acids and water. Ink according to any one of claims 9 to 17, characterized in that said binder part consists of acrylate type resins, a coalescing agent and methoxypropanol. Ink according to any one of claims 7 to 19, characterized in that said binder part is in the range of 99.9 to 5 parts by weight. 4 Ink according to any one of the preceding claims, characterized in that said coarse texture is less than 250 μm. A screen printing technique, characterized in that it comprises the use of an ink according to any one of claims 1 to 21. A screen printing technique according to claim 22, characterized in that said technique deposits on a printing substrate an average paint thickness of between 50 μτη and 100 μπι at each passage of the print. A screen printing technique according to claim 22 or claim 23, characterized in that said technique comprises at least two printing passages. A screen printing technique according to any one of claims 22 to 24, characterized in that said technique comprises a number of printing passages equal to or greater than two and less than 10. A screen printing technique according to any one of claims 22 to 25, characterized in that said technique confers a coarse texture between 50 μκι and 25 0 μτη. A screen printing technique according to any one of claims 22 to 26, characterized in that said technique confers a coarse texture of less than 250 μm. 5 Serigraphic printing technique according to any one of claims 22 to 27, characterized in that said technique confers a coarse texture preferably of less than 150 μτη. Serigraphic printing technique according to any one of claims 22 to 28, characterized in that said technique gives the reproduction a thickness comprised between 200 μτη and 900 μτη. A silk screen printing technique according to any one of claims 22 to 29, characterized in that said technique gives reproduction a thickness of preferably less than 800 μτη. A booklet comprising a carton and printed reproductions of decorative wall products, characterized in that it is printed using an ink according to any one of claims 1 to 21. A booklet comprising a carton and printing reproductions of decorative wall products, characterized in that said reproductions are carried out with the technique according to any one of claims 22 to 30. A booklet comprising a carton and printing reproductions of decorative wall products, characterized in that said reproductions are obtained using a serigraphic printing ink comprising pigments and including mineral fillers in an amount in the range of 0.01 to 20 parts by weight suitable for imparting to said reproductions the roughness, coarse texture and / or thickness of the decorative wall products applied on a wall surface. A booklet according to claim 33, characterized in that said roughness of said reproductions is between 50 and 250 micrometers. A booklet according to claim 33 or 34, characterized in that said mineral fillers comprise silica. Use of an ink according to any one of claims 1 to 21 for the production of booklets comprising a carton and printing reproductions of decorative wall products which have the roughness, coarse texture and / or thickness of the applied decorative wall products on a wall surface. Lisbon, June 11, 2008